We've had a horrible wave of weather the past few weeks; two weeks ago, the heat was in the 90s and even went over 100. When it gets that hot, heat stroke for both dog and man becomes a concern, and dog park visits dwindle to nothing.
However, if the planets align and I get more than two hours sleep the night before, I might drag my carcass out of bed around 7:00 or 7:30 and take Our Best Friend for a walk before the heat gets too deadly. (Also, before the Spouse and Three Dependents are awake and wanting me.) One morning I arrived at the park at 6:58 a.m., which is almost as astonishing as the sun rising in the west. At first I thought we had the place to ourselves, but then I saw a few people at the other end sitting in the shade to avoid the steadily-climbing heat.